What does iff stand for?

If and Only If (SHCU)

Four Star Boats, Inc., Mechanicstown, OH - Manufacturer code for watercraft hull identification number (USCG)

Icelandic Film Fund (SAUO)

Identification, Friend or Foe - Military

If and Only If (IEEE)

Iffley - Australia - Airport symbol - Obsolete (OAG)

Ifo - Language code (ETLW)

Image File Format (SAUS)

Individual Freedom Federation (EA)

Induced Fluid Flow

Industrial Funding Fee (AAGC)

Inert Fluid Fill (AAG)

Information, Friend for Foe (SAUO)

Inner Fracture Face - Medicine (DB)

Institute for the Future

Institute of Freight Forwarders - British

Institute of Natural Resources, Springfield, IL - OCLC symbol (OCLC)

Intensity Fluctuation Factor - Telecommunications (TEL)

Interchangeable File Format (SAUS)

Interchange File Format - Computer science (DCOM)

Interchange Format File (SAUS)

Interfreight Forwarding Ltd. - Sudan - ICAO designator (FAAC)

Intergovernmental Forum on Forests (SAUS)

Intermediate Financing Facility (SAUO)

International Federal Film - Fictitious organization of agents in TV series "Scarecrow and Mrs. King"

International Federation of Falerists (EA)

International Fencing Federation - Paris, France (EA)

International Film Foundation

International Finance Facility - Investment

International Flavors and Fragrances - NYSE symbol

International Flavors & Fragrances, Inc. - NYSE symbol (SPSG)

International Flying Farmers (EA)

International Forum Foundation

International Forum on Forests (SAUO)

International Freedom Foundation (EA)

Internet Fast Forward (SAUS)

Interrogate Friend or Foe (CCCA)

Interrogation Friend or Foe (SAUS)

Ionized Flow Field

Iran Freedom Foundation (EA)

Isoelectric Focusing Facility

Item Intelligence File - DoD

Iterative Function Fractal (SAUS)